Hair iron



FIG. 1 is a top perspective view of a hair iron showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a left side view thereof. 

CLAIM The ornamental design for a hair iron, as shown and described. 